Benzopyran derivatives
US5646308A · kind A · utility
18Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1994 |
| Grant date | Jul 8, 1997 |
| Priority date | — |
| Expiry date | Jul 18, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D493/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Benzopyran derivatives represented by formula (I): ##STR1## wherein X represents .dbd.O, .dbd.S, .dbd.N--Z, etc. (Z represents a lower alkyl group, etc.); Y represents a substituted amino group, an alkoxy group, an alkylthio group, etc., and R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 each represents a hydrogen atom, a lower alkyl group, etc, are disclosed. The benzopyran derivative exhibit K.sup.+ channel opening activities and are widely applicable as antiasthmatics, antiepileptics, and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.